Inquiry (采购产品): UV glue info Hello, I am a researcher in the mechanical engineering department at Northwestern University. As part of a research project we are trying to glue microscopic objects together. The idea is to dip a very sharp needle into a drop of glue, and to apply a microscopic droplet of glue (diameter smaller than 10 microns) on a ceramic substrate. This is done under optical microscope (which mean: a fair amount of white light illumination). Then we bring a microscopic object in contact (material=diamond) and cure the microscopic droplet of glue with UV light exposure (100 W mercury lamp). I have been looking for UV glues that I can use for this. The requirements are (in decreasing order of importance): 1- Tack free surface (I started by using the Dymax 3021 UV glue and was successful in applying the microscopic droplet, but I could never get a good cure. After investigating I found out that glue had oxygen inhibition issues that prevented the cure of the droplet. I think we should stay away from acrylate formulations for this reason) 2- Long work time in white light. I need to be able to manipulate the glue under the microscope (white light). I have recently tried the tack free Loctite 4304 (cyanoacrylate formulation) but the glue cures so fast (even without UV exposure) that I cannot apply the microscopic droplet 3- Good adhesion on ceramics 4- Viscosity around 500 cP 5- Modulus>1GPa (150,000 psi) 6- Small elongation at fracture (<10%) Do you have any UV glues that satisfy these requirements? Thank You, Francois Barthelat Postdoctoral Research Associate Dept. of Mechanical Engineering Northwestern University 2145 Sheridan Road Evanston IL 60208 **** Hidden Message ***** Francois Barthelat 60208 USA Company: Northwestern University Title: Dr. E-mail: f-barthelat@northwestern.edu **** Hidden Message ***** f-barthelat@northwestern.edu
